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OXFORD PRACTICE GRAMMAR 66 QUESTION WORD + TO-INFINITIVE B Structures with what to do, where to go, etc Before the question word we can use a verb such as ask, decide, discover, discus

OXFORD PRACTICE GRAMMAR

66 QUESTION WORD + TO-INFINITIVE

B Structures with what to do, where to go, etc

Before the question word we can use a verb such as ask, decide, discover, discuss,

explain, find out, forget, know, learn, remember, say, think, understand, wonder

It was a real problem I couldn't think what to do

We were wondering where to park the car

Matthew wants to know how to work the computer

Have Trevor and Laura decided when to have their barbecue?

Sometimes there is a verb + object before the question word In

this structure we can use advise, ask, show, teach and tell

Tom showed me how to change a wheel

The guide didn't tell the tourists when to be back at the coach

Before the question word we can also use the adjectives clear, obvious and sure and the

expressions have an idea and make up your mind

I wasn't sure who to ask for help Claire doesn't have much idea how to cook

A preposition (e.g of) can come before the question word

There's the question of who to invite to the reception You need

to be informed about what to do in an emergency

C Why, what, whose, which and whether

We cannot use why before a to-infinitive

No one could explain why we had to wait, NOT No-one-could-

explain-why-to-wait

After what, which, whose, how many and how much, we can use a noun

Sarah and Mark were discussing what colour to paint the walls We

wondered whose story to believe - both drivers said it wasn't their fault It's difficult to know how much luggage to take with you

We can use whether but not if

We'll have to decide whether to go ahead with the project (or not)

NOT We'll have to decide if to go ahead

Melanie wasn't sure whether to ring the doctor or not

I was wondering whether to order some tea

A Introduction

Vicky uses a question word (what) and a toinfinitive

(to wear) She is talking about the best

thing to do I don't know what to wear means that

I don't know what I should wear

66 EXERCISES

1 Structures with what to do, where to go, etc (B)

Comment on these situations

► How do I switch 1 What should I say? 2 Where shall we go 3 How do I stop? the computer on?

1 What should I say? 2 Where shall we

go?

3 How do I stop?

► (not know) He doesn't know how to switch the computer on

1 (can't think)

2 (not sure)

3 (not know)

2 Structures with what to do, where to go, etc (B)

Look at the questions and then complete the paragraph about a man coming out of prison Use a

question word and a to-infinitive

► How should he start a new life? 3 How can he find somewhere to live?

1 What can he expect? 4 What should he do?

2 Where should he go? 5 Who can he contact?

This man will have problems when he leaves prison He needs advice on

(►) how to start a new life

After a long time in prison, he isn't sure (1)……… in the outside world and he has

no idea (2) ……… He doesn't know (3)

a place to live either

But he won't be completely alone A social worker will advise him (4) .,

so he'll know (5) if he needs help

3 Question word + to-infinitive (B-C)

You are finding it very difficult to make your mind up

Complete your answers to the questions Use a question word and a to-infinitive

? Rachel: Are you going to buy that sweater?

You; I don't know whether to buy it or not

? Tom: What time do you think we should leave?

You: I'm not really sure what time to leave

1 Daniel: Do you want to do business studies?

You: I'm wondering business studies or statistics

2 Vicky: How much money should we spend on the present?

You: I've no idea on it

3 Matthew; Do you intend to join the sports club?

You; I can't decide it or not

4 Vicky: Which route should we take?

You: It's difficult to know

5 Melanie: Which lottery numbers are you going to choose? You: I haven't decided